self aligning ball bearings

A self-aligning bearing is recommended when the alignment of the shaft and housing is difficult or when the shaft may bend during operation. Brda notes that similar to deep groove ball bearings, most self-aligning ball are for general use.

Self-aligning ball bearings have two rows of balls, a common sphered raceway in the outer ring and two deep uninterrupted raceway grooves in the inner ring. They are available open or sealed. The bearings are insensitive to angular misalignment of the shaft relative to the housing (fig. 1), which can be caused, for example, by shaft deflection.

Bearing Number	Bore Dia	Outer DIa	Width	Size
30 mm x 72 mm x 27 mm ISO 2306-2RS self aligning ball bearings	Intermediate Duty	Setscrew Ball Bearing	208 Series	Cast Iron
40 mm x 90 mm x 23 mm ISB 1308 KTN9 self aligning ball bearings	Normal Duty	D-Lock Ball Bearing	209 Series	Polymer
AST 2210 self aligning ball bearings	Normal Duty	Setscrew Ball Bearing	207 Series	Ductile Iron
90 mm x 160 mm x 30 mm FAG 1218-TVH self aligning ball bearings	Normal Duty	Grip Tight Ball Bearing	211 Series	Cast Iron
AST 2310 self aligning ball bearings	Normal Duty	Setscrew Ball Bearing	206 Series	Cast Iron
20 mm x 47 mm x 14 mm FBJ 1204K self aligning ball bearings	Normal Duty	Grip Tight Ball Bearing	209 Series	Cast Iron
40 mm x 90 mm x 33 mm NACHI 2308 self aligning ball bearings	Normal Duty	D-Lock Ball Bearing	206 Series	Cast Iron
40 mm x 80 mm x 23 mm FAG 2208-K-2RS-TVH-C3 + H308 self aligning ball bearings	Intermediate Duty	Eccentric Collar Ball Bearing	203 Series	Zinc
100 mm x 180 mm x 46 mm NKE 2220 self aligning ball bearings	Normal Duty	Grip Tight Ball Bearing	207 Series	Cast Iron
90 mm x 160 mm x 30 mm ISO 1218K self aligning ball bearings	Normal Duty	D-Lock Ball Bearing	207 Series	Cast Iron
50 mm x 110 mm x 40 mm FAG 2310-2RS-TVH self aligning ball bearings	Normal Duty	Setscrew Ball Bearing	212 Series	Cast Iron
50 mm x 90 mm x 58 mm NKE 11210 self aligning ball bearings	Intermediate Duty	Setscrew Ball Bearing	209 Series	Cast Iron